Artificial intelligent assistant

sustentable

sustentable, a. Obs. rare.
  [f. L. sustentāre (see sustentate) + -able.]
  Capable of being sustained or maintained; maintainable.

a 1623 Swinburne Spousals (1686) 81 Howsoever the singular Opinion doth seem more probable or more sustentable in the very point of Law.

Oxford English Dictionary

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